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  • Description is exactly "Two rolls of Bubble chamber drawings [Oversize, each about 36 inches wide and 6 feet long]. EFD Bubble chamber drawings : 40inch HBC electronics, optics,1974, WD-915-407-07-R11 and Cryogenics operations, 40inch HBC, data board, 1981, WD-915-407-54-R0"